Because of the reliability and durability of DELTA M switches they are ideal for these applications whether for gas or liquid service. Frequently a switch is mounted just over a rupture disk or pressure relief valve. By doing this the switch will alarm on the slightest leak notifying everyone in many cases before a full release occurs. When working with liquids, it is often best to set it up as a level switch which allows the switch to indicate a leak as soon as the liquid comes in contact with the sensor. In gas applications, it is often best to use a flow switch. With DELTA M switches, capability to indicate gas flows all the way down to .1 feet per second, the smallest leak may be detected.